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Type: Artigo de periódico
Title: Oedometer consolidation test analysis by nonlinear regression
Author: Barros, PLA
Pinto, PRO
Abstract: A numerical method based on least squares nonlinear regression for the evaluation of the consolidation parameters of soils from consolidation tests is presented. A model which includes the initial compression, the primary consolidation, and the secondary compression is used in the regression. This approach allows the resulting regression curve to better fit the experimental data. The method takes the settlement-time readings from the oedometer step-loading consolidation test and calculates automatically the magnitudes of the coefficients of consolidation and of secondary compression. The performance of the proposed method is accessed through consolidation tests executed on four different clay soils, which are analyzed by nonlinear regression and by the usual graphical methods. It is concluded that the proposed method gives results that are close to those obtained by the standard methods of analysis.
Subject: consolidation test
nonlinear regression
least squares
coefficient of consolidation
secondary compression
Country: EUA
Editor: Amer Soc Testing Materials
Citation: Geotechnical Testing Journal. Amer Soc Testing Materials, v. 31, n. 1, n. 76, n. 83, 2008.
Rights: fechado
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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